Effects of anthropogenic seawater acidification on acid-base balance in the sea urchin Psammechinus miliaris
The purple-tipped sea urchin, Psammechinus miliaris, was exposed to artificially acidified seawater treatments (pH(w) 6.16, 6.63 or 7.44) over a period of 8 days. Urchin mortality of 100% was observed at pH(w) 6.16 after 7 days and coincided with a pronounced hypercapnia in the coelomic fluid produc...
Published in: | Marine Pollution Bulletin |
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Language: | English |
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Elsevier BV
2007
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Online Access: | http://hdl.handle.net/10026.1/1348 https://doi.org/10.1016/j.marpolbul.2006.09.021 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/1348 2024-05-19T07:46:37+00:00 Effects of anthropogenic seawater acidification on acid-base balance in the sea urchin Psammechinus miliaris Miles, H Widdicombe, S Spicer, JI Hall-Spencer, J 2007-01-01 89-96 Print-Electronic http://hdl.handle.net/10026.1/1348 https://doi.org/10.1016/j.marpolbul.2006.09.021 en eng Elsevier BV England ISSN:0025-326X ISSN:1879-3363 E-ISSN:1879-3363 0025-326X 1879-3363 http://hdl.handle.net/10026.1/1348 doi:10.1016/j.marpolbul.2006.09.021 Not known carbon dioxide hypercapnia ocean acidification carbon sequestration acid-base balance Psammechinus miliaris journal-article Article 2007 ftunivplympearl https://doi.org/10.1016/j.marpolbul.2006.09.021 2024-05-01T00:05:12Z The purple-tipped sea urchin, Psammechinus miliaris, was exposed to artificially acidified seawater treatments (pH(w) 6.16, 6.63 or 7.44) over a period of 8 days. Urchin mortality of 100% was observed at pH(w) 6.16 after 7 days and coincided with a pronounced hypercapnia in the coelomic fluid producing an irrecoverable acidosis. Coelomic fluid acid-base measures showed that an accumulation of CO(2) and a significant reduction in pH occurred in all treatments compared with controls. Bicarbonate buffering was employed in each case, reducing the resultant acidosis, but compensation was incomplete even under moderate environmental hypercapnia. Significant test dissolution was inferred from observable increases in the Mg(2+) concentration of the coelomic fluid under all pH treatments. We show that a chronic reduction of surface water pH to below 7.5 would be severely detrimental to the acid-base balance of this predominantly intertidal species; despite its ability to tolerate fluctuations in pCO(2) and pH in the rock pool environment. The absence of respiratory pigment (or any substantial protein in the coelomic fluid), a poor capacity for ionic regulation and dependency on a magnesium calcite test, make echinoids particularly vulnerable to anthropogenic acidification. Geological sequestration leaks may result in dramatic localised pH reductions, e.g. pH 5.8. P. miliaris is intolerant of pH 6.16 seawater and significant mortality is seen at pH 6.63. Article in Journal/Newspaper Ocean acidification PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Marine Pollution Bulletin 54 1 89 96 |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
carbon dioxide hypercapnia ocean acidification carbon sequestration acid-base balance Psammechinus miliaris |
spellingShingle |
carbon dioxide hypercapnia ocean acidification carbon sequestration acid-base balance Psammechinus miliaris Miles, H Widdicombe, S Spicer, JI Hall-Spencer, J Effects of anthropogenic seawater acidification on acid-base balance in the sea urchin Psammechinus miliaris |
topic_facet |
carbon dioxide hypercapnia ocean acidification carbon sequestration acid-base balance Psammechinus miliaris |
description |
The purple-tipped sea urchin, Psammechinus miliaris, was exposed to artificially acidified seawater treatments (pH(w) 6.16, 6.63 or 7.44) over a period of 8 days. Urchin mortality of 100% was observed at pH(w) 6.16 after 7 days and coincided with a pronounced hypercapnia in the coelomic fluid producing an irrecoverable acidosis. Coelomic fluid acid-base measures showed that an accumulation of CO(2) and a significant reduction in pH occurred in all treatments compared with controls. Bicarbonate buffering was employed in each case, reducing the resultant acidosis, but compensation was incomplete even under moderate environmental hypercapnia. Significant test dissolution was inferred from observable increases in the Mg(2+) concentration of the coelomic fluid under all pH treatments. We show that a chronic reduction of surface water pH to below 7.5 would be severely detrimental to the acid-base balance of this predominantly intertidal species; despite its ability to tolerate fluctuations in pCO(2) and pH in the rock pool environment. The absence of respiratory pigment (or any substantial protein in the coelomic fluid), a poor capacity for ionic regulation and dependency on a magnesium calcite test, make echinoids particularly vulnerable to anthropogenic acidification. Geological sequestration leaks may result in dramatic localised pH reductions, e.g. pH 5.8. P. miliaris is intolerant of pH 6.16 seawater and significant mortality is seen at pH 6.63. |
format |
Article in Journal/Newspaper |
author |
Miles, H Widdicombe, S Spicer, JI Hall-Spencer, J |
author_facet |
Miles, H Widdicombe, S Spicer, JI Hall-Spencer, J |
author_sort |
Miles, H |
title |
Effects of anthropogenic seawater acidification on acid-base balance in the sea urchin Psammechinus miliaris |
title_short |
Effects of anthropogenic seawater acidification on acid-base balance in the sea urchin Psammechinus miliaris |
title_full |
Effects of anthropogenic seawater acidification on acid-base balance in the sea urchin Psammechinus miliaris |
title_fullStr |
Effects of anthropogenic seawater acidification on acid-base balance in the sea urchin Psammechinus miliaris |
title_full_unstemmed |
Effects of anthropogenic seawater acidification on acid-base balance in the sea urchin Psammechinus miliaris |
title_sort |
effects of anthropogenic seawater acidification on acid-base balance in the sea urchin psammechinus miliaris |
publisher |
Elsevier BV |
publishDate |
2007 |
url |
http://hdl.handle.net/10026.1/1348 https://doi.org/10.1016/j.marpolbul.2006.09.021 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
ISSN:0025-326X ISSN:1879-3363 E-ISSN:1879-3363 0025-326X 1879-3363 http://hdl.handle.net/10026.1/1348 doi:10.1016/j.marpolbul.2006.09.021 |
op_rights |
Not known |
op_doi |
https://doi.org/10.1016/j.marpolbul.2006.09.021 |
container_title |
Marine Pollution Bulletin |
container_volume |
54 |
container_issue |
1 |
container_start_page |
89 |
op_container_end_page |
96 |
_version_ |
1799486836443185152 |